@article{CM_1969__21_3_262_0,
     author = {Siddiqi, Jamil A.},
     title = {A strengthened form of a theorem of {Fej\'er}},
     journal = {Compositio Mathematica},
     pages = {262--270},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {21},
     number = {3},
     year = {1969},
     mrnumber = {256062},
     zbl = {0177.31802},
     language = {en},
     url = {http://www.numdam.org/item/CM_1969__21_3_262_0/}
}